John F. Kennedy Age at Inauguration: 43
John F. Kennedy Number Number 35th President Vice President Vice President Lyndon B. Johnson Party Affiliation Party Affiliation Democratic Years in Office Years in Office 1961 - 1963 2 years 41 weeks Age (at inauguration) Age (at inauguration) 43 years 33 weeks Birthplace Birthplace Brookline, Massachusetts Education Education Harvard College // Age at Inauguration: 43 At age 43, John F. Kennedy was the youngest president ever elected. Still, he only checks in at No. 2 on the countdown, so stay tuned for No. 1 on the list. The Harvard-educated Massachusetts native initiated Project Apollo (the first manned expedition to the moon) and abolished the federal death penalty during his tenure as president. JFK entered office with a 72 percent approval rating and served for 2.83 years before he was assassinated by Lee Harvey Oswald in November 1963 at age 46.